51615565005 has 16 divisors (see below), whose sum is σ = 84143111040. Its totient is φ = 27008899008.

The previous prime is 51615565003. The next prime is 51615565021. The reversal of 51615565005 is 50056551615.

It is not a de Polignac number, because 51615565005 - 2¹ = 51615565003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615565003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32461825 + ... + 32463414.

It is an arithmetic number, because the mean of its divisors is an integer number (5258944440).

Almost surely, 2^51615565005 is an apocalyptic number.

It is an amenable number.

51615565005 is a deficient number, since it is larger than the sum of its proper divisors (32527546035).

51615565005 is a wasteful number, since it uses less digits than its factorization.

51615565005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64925300.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 51615565005 in words is "fifty-one billion, six hundred fifteen million, five hundred sixty-five thousand, five".